Re: slow update & index question - Mailing list pgsql-general

From Stephan Szabo
Subject Re: slow update & index question
Date
Msg-id 20021021115534.G73781-100000@megazone23.bigpanda.com
Whole thread Raw
In response to Re: slow update & index question  ("Williams, Travis L, NPONS" <tlw@att.com>)
List pgsql-general
On Mon, 21 Oct 2002, Williams, Travis L, NPONS wrote:

> I did do a vacuum.. but I don't know what analyze does..

Analyze will update the statistics on the table that are used
for planning purposes. If for example explain shows that it's doing
a sequential scan, it may not for example realize that the index is
useful in limiting the number of rows sufficiently to beat the
sequential scan.




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